Home / 679,478.40-1,018,051.20-442,699.20

Finding the Fourth Proportional to 679,478.40, 1,018,051.20 and 442,699.20

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Solution

The fourth proportional to 679,478.40, 1,018,051.20 and 442,699.20 is: 663,288.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,478.40 : 1,018,051.20 = 442,699.20 : x
  2. Step 2: Convert to fraction form
    679,478.40/1,018,051.20 = 442,699.20/x
  3. Step 3: Cross multiply
    679,478.40x = 1,018,051.20 × 442,699.20
  4. Step 4: Simplify right side
    679,478.40x = 450,690,451,799.04
  5. Step 5: Solve for x
    x = 450,690,451,799.04/679,478.40
  6. Step 6: Final answer
    x = 663,288.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.